Improvement jnthe giffard injector



W. SELLERS.

GIFFARD INJECTOR.

No. 39,312. Patented July 21., 1863.

UNITED STATES PATENT OEEIGE.

YILLIAM SELLERS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT lN THE vGl-FFARD'INJECT'OR Specification forming part of Letters Patent No. 39,312, dated July 2l, 1863.

To all whom 'it may concern Be it known that LI, WILLIAM SELLERS, of the city of Philadelphia and State of Pennsylvania, have invented new and useful Improvements` in the Construction and Application of Giifards Injector; and I do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawing, and to the figures and letters of reference marked thereon.

My invent-ion relates to theself-acting feeding apparatus for steam-boilers for which Letters Patent of the United States, dated April 24, 1860, were granted to Henry Gi'ard, of the city of Paris, France; and consists, first, in an improved and simplified construction of the instrument, whereby the receiving and delivery pipes (being the most vital parts of the same) are arranged separately from and so attached to the main cylinder or shell of the instrument that in case of injury they may be readilyremoved and examined, and, if damaged beyond repair, replaced by new pieces, without in any way disturbing the other parte of the instrument.

Another important feature of my invention, by the use of which the instrument may be started to lifting and forcing water when in a well or pit, or such other situation that the injector itself cannot be reached, and by which it is also made capable of lifting its supply of feed-water to a greater height than has been heretofore attained, consists in attaching, at the lower end of the water-supply pipe, an ordinary check-valve. for the purpose of maintaining a column of water up to the level of the waterchamber in the injector, and, in addition thereto, providing a means of priming or raising this column of water above the level of the water-chamber at the time of starting the instrument. This being accomplished,.the priming arrangement may be shut oi, when the instrument will receive its supply of water through the check-valve only.

And in order that my said invention may be fully understood, I will now proceed more particularly' to describe its construction and operation.

Referring to the drawing forming part of this specification, in which the same letters of reference allude to similar parts throughout the several views, Figure l is a sectional elevation of an injector with my improvements attached, and Fig. 2 represents in section the lower part of an injector of the ordinary construction.

In my improved arrangelnent of the instru ment the cylinder or shellconsists in a single casting, A, Fig. 1, which is provided with nozzles for the attachment of the steam-pipe B, water-supply pipe C, and overflow l).

E is the water-chamber, and F the ram or piston, extending from the latter through the top ofthe cylinder, and there actuated by means of the hand-wheel G.

The piston F is fitted in the usual manner with atapered mouth-piece, H, and a spindle, I, for regulating and adjusting the'supply of steam.

K is the delivery-pipe, screwed into thc body of metal separating the water-chamber from the overflow-chamber, and L the receivingpipe, screwed into the lower` end of the cylinder A, the diameter of the screw-thread at this point being made sufficiently large to admit freely the delivery pipe and a socketwrench for securing the delivery-pipe K in its position.

0n reference to Fig. 2, it will be seen that in the ordinary construction of the injector the shell or cylinder is composed of three different pieces, of which the upper one, A', contains the piston, and comprises the steam and water chambers, while'solid with the middle piece, B', is cast the delivery-pipe K', the bottom piece, G', embracing the receiving-pipe L', overflow D', and check-valve chamber E'.

The advantages of my improved construction of the instrument will be obvious upon comparing the two plans. The delivery and receiving pipes are the most diiiicult to make, and this difficulty is increased by having a large mass of metal connected with them; but, by being entirely separate from the cylinder or other parts of the injector, they can be easily removed and repaired, or, in case of severe damage, be replaced by new pieces, without interfering in any way with the other parts of the instrument.

Referring to the second part of my improvements, M is the water-supply pipe, which is, by means of an elbow, M', connected to the injector. N is the check-valve attached to the lower end of pipe M, the priming arrangement consisting of an upward extension, O, of pipe M, provided with a cock, R, and a funnel` shaped receptacle, I), for supplying the primin g-Water. Before attempting to start the instrument both the Water-supply pipe M and vessel I should be filled with Water.

To start the injector, the cock R is irst opened and the Water allowed to iloW through the injector. Steam is then admitted, and as soon as the proper action of the instrument is established the cock R should be closed, the supply of Water being thereupon drawn from the pipe M through the check-valve N only.

In cases Where the injector is employed for lifting and forcing Water from a Well or pit, or Whenever otherwise it is so situated as to be inconvenient of access, this improved arrangement of the watersupply pipe is particularly useful and applicable. When the injector itselt' is thus placed out of reach, the piston F and spindle I of the injector, when once `adjusted for the required supply of .water and steam, remain fixed in their respective posi- `tions, only the steam-valve and priming arrangement requiring to be accessibly situated for the management oi' the instrument.-

It will be readily understood that the described methodv of priming the Water-supply pipe may be modified in various Ways'. A small pump, for example, connected with the pipe M from below, and employed for the purpose of raising and maintaining a column. of Waterin the same previous to and While start'- ing the instrument, will accomplish the same object as the means hereinbefore described.

Having thus set forth the nature of my invention andthe manner in which the same may be used, I wish to be understood that I do not desire to confine myself to the described construction and arrangement of the various parts of my improvements, Wherever the same may be 'modified or equivalents substituted Without impairing my invention; but

What I claim as my invention,.and desire to secure by Letters Patent, is l 1. The outer framing or case of the injector, when it is constructed, substantially as described, so as to maintain all the working parts of the instrument in their relative positions to each other and to admit of changing any ot these parts Without affecting theremainder.

2. Providing the Water-supply pipe of the instrument with a check-valve and the described priming arrangement, or its equivalent, the Whole operating substantially in the manner and for the purpose specied.

WM. SELLERS.

Witnesses:

GEO. Sr. GEORGE, OLIVER HoUGi-L 

